Signal detail or null (default)
signal callback delegate or function to connect
void callback(string actionName, bool enabled, gio.action_group.ActionGroup actionGroup)
actionName the name of the action in action_group (optional)
enabled whether the action is enabled or not (optional)
actionGroup the instance the signal is connected to (optional)
Yes.After to execute callback after default handler, No.After to execute before (default)
Signal ID
Connect to ActionEnabledChanged signal.
Signals that the enabled status of the named action has changed.